84140447 has 2 divisors, whose sum is σ = 84140448. Its totient is φ = 84140446.

The previous prime is 84140443. The next prime is 84140557. The reversal of 84140447 is 74404148.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84140447 - 2² = 84140443 is a prime.

It is a super-2 number, since 2×84140447² = 14159229642719618, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84140443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42070223 + 42070224.

It is an arithmetic number, because the mean of its divisors is an integer number (42070224).

Almost surely, 2^84140447 is an apocalyptic number.

84140447 is a deficient number, since it is larger than the sum of its proper divisors (1).

84140447 is an equidigital number, since it uses as much as digits as its factorization.

84140447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14336, while the sum is 32.

The square root of 84140447 is about 9172.8102018956. The cubic root of 84140447 is about 438.1958615423.

The spelling of 84140447 in words is "eighty-four million, one hundred forty thousand, four hundred forty-seven".